Race condition in Linux kernel - CVE-2026-99028

Vulnerability details

The vulnerability allows a local privileged user to corrupt freed memory through DMA writes, potentially causing a denial of service.

The vulnerability exists due to a race condition between axienet_dma_rx_cb() and axienet_stop() in the Xilinx AXI Ethernet driver's dmaengine path when receive-buffer resubmission overlaps interface teardown. A local privileged user can trigger interface shutdown during receive processing, if permitted, to leave the DMA engine writing into a buffer freed by teardown, potentially corrupting memory and causing a denial of service.

Affected software

How to mitigate CVE-2026-99028

External References

• https://git.kernel.org/stable/c/079396129da5e7cb40ca0920aa1b9525bef6097c
• https://git.kernel.org/stable/c/5e5cf3ad7c099ff86ea9e422cddb25a2e5317b58
• https://git.kernel.org/stable/c/bcf2573a68a808a5b54cadafa72b6672e662c2bf
• https://git.kernel.org/stable/c/eececf7c3a679d9c08175ad6bacbc8c31848f5af

Related Security Bulletins

• Race condition in Linux kernel ethernet xilinx driver
• Debian update for linux